﻿// Copyright 2006 - Ricardo Stuven (rstuven@gmail.com)
//
// This file is part of MsSqlSpatial.
// MsSqlSpatial is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
// 
// MsSqlSpatial is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Lesser General Public License for more details.

// You should have received a copy of the GNU Lesser General Public License
// along with MsSqlSpatial; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 

using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Data.SqlTypes;
using Microsoft.SqlServer.Server;
using MsSqlSpatial;
using GeoAPI.Geometries;

public partial class TableValuedFunctions
{
	[SpatialQuery]
	[SqlFunction(
		 FillRowMethodName = SpatialQuery.FillRow
		, TableDefinition = SpatialQuery.TableDefinition
		, DataAccess = DataAccessKind.Read
		, SystemDataAccess = SystemDataAccessKind.Read
	)]
	public static IEnumerable EqualsExactQuery(
		SqlString table_name,
		SqlString column_name,
		SqlBytes ewkb,
		SqlDouble tolerance)
	{
		return SpatialQuery.Execute(table_name, column_name, ewkb, new SpatialQuery.Arguments(tolerance), EqualsExactQueryHandler);
	}

	[SpatialQuery]
	[SqlFunction(
		 FillRowMethodName = SpatialQuery.FillRow
		, TableDefinition = SpatialQuery.TableDefinition
		, DataAccess = DataAccessKind.Read
		, SystemDataAccess = SystemDataAccessKind.Read
	)]
	public static IEnumerable EqualsExactQueryWhere(
		SqlString table_name,
		SqlString column_name,
		SqlBytes ewkb,
		SqlDouble tolerance,
		SqlString condition)
	{
		return SpatialQuery.Execute(table_name, column_name, ewkb, condition, new SpatialQuery.Arguments(tolerance), EqualsExactQueryHandler);
	}

	private static IEnumerable EqualsExactQueryHandler(SqlDataReader reader, IGeometry geometry, SpatialQuery.Arguments args)
	{
		double tolerance;
		if (args.double1.IsNull)
			tolerance = 0;
		else
			tolerance = args.double1.Value;

		List<Int64> oids = new List<Int64>();
		while (reader.Read())
		{
			IGeometry _geometry = ConvertGeometry.ToGeometry(reader.GetSqlBytes(1));
			if (geometry.EqualsExact(_geometry, tolerance))
			{
				oids.Add((long)reader.GetValue(0));
			}
		}
		return oids;
	}

};

